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Roofing granules with high solar reflectance, roofing materials with high solar reflectance, and the process of making the same

  • US 8,394,498 B2
  • Filed: 12/16/2008
  • Issued: 03/12/2013
  • Est. Priority Date: 12/16/2008
  • Status: Active Grant
First Claim
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1. Roofing granules comprising:

  • (a) a core having an average ultraviolet transmission of greater than sixty percent and an average near infrared reflectance of greater than sixty percent, the core having an exterior surface, and(b) a UV coating layer to cover the exterior surface, the UV coating layer having an average ultraviolet transmission of less than ten percent and an average transmission in the near infrared and visible ranges of the electromagnetic spectrum of greater than sixty percent.

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